Tuesday, October 18, 2016

Physics Colloquium - Friday, October 21st

This week’s Physics department colloquium is Friday, October 21st4:00-5:00pm in PSB 160/161.

Dr. Qiang Li from the Brookhaven National Laboratory will be speaking. The abstract is below.

Title: Chiral Magnetic Effect in Condensed Matters

Abstract: The chiral magnetic effect is the generation of electrical current induced by chirality imbalance in the presence of magnetic field. It is a macroscopic manifestation of the quantum chiral anomaly in systems possessing charged chiral fermions. In quark-gluon plasma containing nearly massless quarks, the chirality imbalance is sourced by the topological transitions. In condensed matter systems, the chiral quasiparticles emerge in the Dirac and Weyl semimetals having a linear dispersion relation. Recently, the chiral magnetic effect was discovered first in a 3D Dirac semimetal ZrTe5, in which we observed a large negative magnetoresistance when magnetic field is parallel with the current. The measured quadratic field dependence of the magnetoconductance is a clear indication of the chiral magnetic effect [Li et al arXiv:1412.6543, Nature Physics (2016) doi:10.1038/nphys3648)]. It is now observed in more than half a dozen Dirac and Weyl semimetals. 3D Dirac/Weyl semimetals have opened a fascinating possibility to study the quantum dynamics of relativistic field theory in condensed matter experiments, with potential for important practical applications.


Cathryn Anderson
Office Assistant
Physics Department
University of Central Florida

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